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The Ka for a weak acid, HA is 1.6 x 10^6. What are the pH and degree of ionization of the acid in a 10^-3 M solution. Calculate the pKa and pKb.
A diamond weighs 5.35 ounces. How much is it worth if the going price of diamonds is 627 dollars per carat? 1 carat is equal to 200 milligrams
The compound KB5O8·X H2O was analyzed and found to contain 24.6% of water. If the formula weight of this compound is 293.15 g/mol, what is the number of water molecules (X) in the formula?
The rate law for a hypothetical reaction is rate=k[a]2. when the concentration is .10 moles/liter, the rate is 2.7 times 10-5 moles/liter second. what is the value of k?
Consider a galvanic (voltaic) cell that has the generic metals X and Y as electrodes. If X is more reactive than Y (that is, X more readily reacts to form a cation than Y does),
what is the molarity of an aqueous solution containing 360g of glucose in 2.0L of solution.
HEPES are synthetic amine compounds that are often used to make buffers for biochemical studies. What is the pH of a 1.0 L buffer solution that is 0.250M HEPES
Find the contact time for inactivating Gardia cysts - How much contact time would be required for inactivating Gardia cysts
In a closed 1.00 L flask, 2.60 atm of CO reacts with 5.80 atm of O2 according to the equation below. Assuming that the temperature remains constant, what is the final pressure in the flask?
Write a balanced equation for the reaction. What volume of 0.200M MnO4- solution is needed to titrate 22.5mL of a 0.350M solution of ethanol?
What is the molarity of a HCl solution if the reaction of 200mL of the solution with excess CaCO3 produces 10.5L of Co2 gas at 725mmHg and 18C?
What range of pH is suitable for this kind of buffer? Calculate the ratio of phosphoric acid to phosphate to gice you pH .= 6.8
What is the empirical formula of a hydrocarbon if complete combustion or 6.000 mg of the hydrocarbon produced
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